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Patent Searching and Data


Title:
LENS HOLDING BARREL AND OPTICAL EQUIPMENT USING THE SAME
Document Type and Number:
Japanese Patent JPH08271775
Kind Code:
A
Abstract:

PURPOSE: To high-accurately hold at least two lenses on a lens barrel by making the shape of a receiving surface nearly the same as that of the curved surface of a lens which is brought into contact with the receiving surface in the case the lens is held by utilizing the receiving surface provided on one part of the lens barrel.

CONSTITUTION: When the lens 12 is held by utilizing the receiving surface 13a provided on one part of the lens barrel 13, the shape of the surface 13a is nearly the same as that of the curved surface of the lens which is brought into contact with the surface 13a. As to the plastic lens 12 shown by a figure; the lens surface on a right side is brought into contact with the lens barrel 13, a part (the same curvature area) 12a having the same curved surface (curvature) as that of the curved surface (curvature) of the lens surface on the right side (marginal contact side) of the lens 11 is provided, and the lens 11 is brought into contact (marginal contact) with the lens 12 at the part 12a. As to the lens 12 and the lens barrel 13; the lens surface of the right side is brought into contact with the receiving surface 13a only in an optical axis 14 direction, and clearance is provided in a direction perpendicular to the optical axis 14.


Inventors:
NAGANO MASATOSHI
Application Number:
JP1995000096096
Publication Date:
October 18, 1996
Filing Date:
March 29, 1995
Export Citation:
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Assignee:
CANON KK
International Classes:
G02B7/02; (IPC1-7): G02B7/02
Attorney, Agent or Firm:
高梨 幸雄